JP2012076722A - Seat belt retractor mounting structure - Google Patents

Abstract

A retractor of a seat belt device for a rear seat can be attached with a minimum change to an existing vehicle type.
A seat belt retractor mounting structure for mounting a retractor (34) capable of winding an upper body seat belt (7) on a rear center seat of a vehicle to a vehicle body, a plurality of pillars (37) and an inner panel (46) at the rear of the vehicle. The retractor 34 is fixed to the vehicle body via the bracket 40.
[Selection] Figure 2

Description

  The present invention relates to a seat belt retractor mounting structure, and more particularly to a structure for mounting a retractor to a vehicle body in a three-point seat belt device provided in a rear seat of a vehicle.

In recent years, a three-point seat belt device has been required for a rear seat of a vehicle in order to improve the safety of an occupant riding in the rear seat of the vehicle.
The upper body seat belt of the three-point seat belt device is tensioned by a retractor provided at the rear upper part of the seat. The three-point seatbelt device for the center seat of the three-seat rear seat has a retractor attached to the upper part of the rear pillar on either the left or right side of the vehicle body, and the upper body seat through a guide supported by the skeleton of the vehicle body rear ceiling The belt is wound up (Patent Document 1).

JP 2008-302798 A

  In Patent Document 1, the mounting position of the support member that supports the seat belt for the outer seat of the rear seat and the retractor for the center seat are close to each other, but it may be difficult to make them close to each other depending on the vehicle type. In particular, when adding a three-point seat belt device to an existing vehicle type that does not have a three-point seat belt device in the rear seat, the arrangement of the strength members of the vehicle body such as pillars and the arrangement of the rear seat are preset. Therefore, there is a possibility that the retractor for the rear center seat must be attached to a relatively low strength portion such as a body panel in front of the pillar. In this way, when a retractor is attached to a low-strength part of the vehicle body, the existing vehicle type must be changed significantly, such as by welding a strength member to the body panel, and there is a risk that design costs and parts costs will increase significantly. is there.

  The present invention has been made to solve such problems, and the object of the present invention is to provide a seat belt that can be mounted with a retractor of a seat belt device for a rear seat with a small change of the vehicle body to an existing vehicle type. The object is to provide a retractor mounting structure.

To achieve the above object, the seat belt retractor mounting structure according to claim 1 is a seat belt retractor mounting structure for mounting a retractor capable of winding up an upper body seat belt on a rear center seat of a vehicle to a vehicle body, A bracket fixed to the vehicle body at a plurality of locations is provided, and the retractor is fixed to the vehicle body via the bracket.
According to a second aspect of the present invention, there is provided the seat belt retractor mounting structure according to the first aspect, wherein the bracket is fixed to a pillar extending in the vertical direction at least at the rear portion of the vehicle body.

  According to a third aspect of the present invention, there is provided the seat belt retractor mounting structure according to the first or second aspect, wherein the bracket is attached to the vehicle body with respect to the fixed position closest to the connection position between the retractor and the bracket, A reinforcing member is provided.

According to the first aspect of the present invention, since the retractor is fixed to the vehicle body via the bracket, the retractor is mounted on the vehicle body strength member even if the mounting position of the rear center seat retractor does not match the position of the vehicle body strength member. It becomes possible to fix to.
Therefore, it is possible to add a three-point seat belt device for the rear center seat to the existing model without a three-point seat belt device in the rear seat, without significantly changing the vehicle body. The parts cost can be greatly reduced.

Moreover, since the bracket is fixed to the vehicle body at a plurality of locations, the stress acting on the vehicle body can be dispersed, and the required strength of the vehicle body at the bracket fixing position can be reduced.
According to the invention of claim 2, since the bracket is fixed to at least the pillar which is the strength member of the vehicle body, the fixing strength of the bracket, and thus the fixing strength of the retractor can be sufficiently secured.

  According to the invention of claim 3, the reinforcing member is provided at the fixed position where the stress is maximized by the load acting on the retractor, and the strength of the vehicle body can be effectively ensured with a small amount of reinforcement.

1 is a front view of a rear seat of a vehicle according to an embodiment of the present invention. The expansion perspective view which shows the attachment structure of a retractor. Sectional drawing which shows the structure of the attaching part of a bracket. Sectional drawing which shows the attachment structure of a bracket and a vehicle body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a rear seat of a vehicle that employs a retractor mounting structure for a seat belt device according to an embodiment of the present invention.
The seat belt device employing the retractor mounting structure of the present invention is provided in the rear seat of a vehicle, for example, the last row of seats in a 1BOX car. As shown in FIG. 1, the rear seat 1 is for three persons, and the retractor mounting structure of the present invention is applied to the seat belt device 2 for the central seat 1a.

The right seat 1b and the left seat 1c of the rear seat 1 are provided with three-point seat belt devices 4 and 5 that support a seated person's waist and upper body by an integrated seat belt 3, and the central seat 1a has a lower portion. A three-point seat belt device 2 in which the seat belt 6 and the upper body seat belt 7 are separated is provided.
The seat belt devices 4 and 5 for the right seat 1b and the left seat 1c have a seat belt 3, a retractor 10, a shoulder anchor 11 provided with a belt guide 11a, a tongue plate 12 and a base end portion of the seat belt 3. It is comprised from the anchor 13 fixed horizontally. The seat belt device 4 for the right seat 1b and the seat belt device 5 for the left seat 1c are provided symmetrically.
Hereinafter, the seat belt device 4 for the right seat 1b will be described.

  The retractor 10 is installed in the lower part of the right rear pillar 20 of the vehicle, the front end of the seat belt 3 fixed to the right side of the right seat 1b can be wound with a spring force, and the seat belt 3 When a predetermined tension is applied, the drawer can be locked. As shown in FIG. 1, the belt guide 11 a is a member that suspends and supports the seat belt 3, and is supported by the pillar 20 by the shoulder anchor 11. The tongue plate 12 is a member connected to the buckle 21 on the left side of the right seat 1b, and includes a belt hole (not shown) through which the seat belt 3 is freely inserted.

When the seat belt device 4 is used, the seat belt 3 is pulled out of the retractor 10 while the seat belt 3 is pulled by the tongue plate 12, and the tongue plate 12 is connected to the buckle 21 on the left side of the right seat. Thus, the occupant seated in the right seat 1b of the rear seat 1 can hold the upper body diagonally by the seat belt 3 from around the waist and from the right shoulder to the left waist.
Further, after use of the seat belt device 4, the tongue plate 12 is removed from the buckle 21, whereby the seat belt 3 is wound around the retractor 10, and the tongue plate 12 is returned to the position of the pillar 20.

  The seat belt device 2 for the central seat is divided into a lower seat belt 6 that holds the seated occupant around the waist and an upper body seat belt 7 that holds the upper body diagonally from the left shoulder to the right waist of the occupant. ing. The lower seat belt 6 has a base end portion fixed to the left side of the central seat 1a and a tongue plate 31 attached to the front end. The tongue plate 31 is configured to be connectable to the buckle 32 on the right side of the central seat 1a.

The seat belt device 2 includes a retractor 34, a belt guide 35, and a tongue plate 36 for the upper body seat belt 7.
The retractor 34 is provided on an upper portion of the left rear pillar 37 so that the upper body seat belt 7 can be wound up by a spring force and can be pulled out and locked when a predetermined tension is applied to the upper body seat belt 7. It is configured. The belt guide 35 is a member that suspends and supports the upper body seat belt 7 at the upper left rear of the central seat 1a, and is supported by a skeleton 38 of the ceiling of the vehicle body by an anchor (not shown). The tongue plate 36 is a member connected to the buckle 39 on the right side of the central seat 1a, and is attached to the tip of the upper body seat belt 7.

  When using the upper body seat belt 7, the upper body seat belt 7 is pulled out from the retractor 34 while the upper body seat belt 7 is pulled by the tongue plate 36, and the tongue plate 36 is attached to the buckle 39 on the right side of the central seat 1a. Link. As a result, the upper body is pressed diagonally by the upper body seat belt 7 from the left shoulder to the right waist of the occupant seated in the central seat 1a. Further, after the upper body seat belt 7 is used, the upper body seat belt 7 is wound around the retractor 34 by removing the tongue plate 36 from the buckle 39, and the tongue plate 36 is returned to the position of the belt guide 35. .

FIG. 2 is an enlarged perspective view showing the attachment structure of the retractor 34. 3 is a cross-sectional view showing the structure of the mounting portion of the bracket 40, and FIG. 4 is a cross-sectional view showing the structure of the mounting portion of the bracket 40 and the vehicle body.
As shown in FIG. 2, the retractor 34 is disposed on the front side of a pillar 37 at the rear left side of the vehicle that extends in the vertical direction. The retractor 34 is provided with a plate-like fixing member 42 extending parallel to the axis of the drum portion 41 on the side surface of the drum portion 41 that winds up the upper body seat belt 7, and the fixing member 42 is disposed on a substantially vertical surface. Thus, the upper body seat belt 7 can be pulled out from the drum portion 41 from the side opposite to the fixing member 42. The fixing member 42 protrudes in a U shape below the drum portion 41, and a bolt hole into which the retractor connecting bolt 44 is inserted is provided in the extended portion.

  Furthermore, in this embodiment, a bracket 40 that connects the pillar (inner panel inner) 37 at the rear left side of the vehicle and the fixing member 42 of the retractor 34 is provided. The bracket 40 is made of a substantially square thick plate material, and is disposed below the retractor 34. A bolt hole for inserting the retractor connecting bolt 44 is provided in the upper portion of the bracket 40. As shown in FIGS. 2 to 4, the rear side of the bracket 40 is bent into an L shape to form a collar portion 45, and the collar portion 45 is provided with two bolt holes spaced vertically. ing. A lower end portion of the bracket 40 on the vehicle front side is provided with a bolt hole for inserting a bolt 47 that is bent outward in the left-right direction of the vehicle and attached to the inner panel 46 of the vehicle.

  The bracket 40 is fastened at the upper portion by a fixing member 42 of the retractor 34 and a retractor connecting bolt 44, and at the flange portion 45 on the rear side of the vehicle, bolts 48, 49 are provided at two positions on the front side of the pillar 37 on the left side of the vehicle. Furthermore, it is fastened by the inner panel 46 and the bolt 47 of the vehicle at the lower end portion on the vehicle front side. Therefore, the retractor 34 is fixed to the vehicle body via the bracket 40 at three locations, and two of them are fixed to the pillar 37 that is a strength member of the vehicle body.

The mounting position of the retractor 34 with respect to the vehicle body is determined according to the position of the rear seat 1 of the vehicle. Therefore, when an attempt is made to attach the three-point seat belt device 2 to an existing vehicle type that does not include the three-point seat belt device in the rear seat 1, depending on the position of the rear seat 1, it is a strength member. Fixing to the pillar 37 may be difficult.
In the present embodiment, the retractor 34 is disposed in front of the pillar 37 at the rear left side of the vehicle, and it is difficult to directly fasten the fixing member 42 and the pillar 37 with a bolt. However, by using the bracket 40, the retractor 34 is used. It becomes possible to fix 34 to the pillar 37 which is an intensity | strength member.

Therefore, even if the front-rear position of the retractor 34 with respect to the strength member of the vehicle body is shifted, the retractor 34 of the seat belt device 2 for the central seat 1a of the rear seat 1 of the vehicle can be fixed without making a significant change to the vehicle body. It becomes possible.
Further, since the bracket 40 is fixed to the vehicle body at three locations, when the upper seat belt 7 is suddenly pulled and a large load is applied to the retractor 34, the stress acting on the vehicle body via the bracket 40 is increased. The required strength of the vehicle body at the mounting position of the retractor 34 can be reduced.

  Furthermore, in this embodiment, as shown in FIG. 3, a reinforcing plate 50 is provided in the pillar 37 so as to match the flange portion 45 of the bracket 40, and is fastened together with the bracket 40 and the front wall of the pillar 37 by a bolt 48. . Thereby, insufficient strength of the pillar 37 at the mounting portion of the bracket 40 can be compensated. In particular, the reinforcing plate 50 is provided at the mounting portion of the bolt 48 that is closest to the retractor connecting bolt 44 that connects the retractor 34 and the fixing member 42 among the bolts 47, 48, 49 that fix the bracket 40 to the vehicle body. Good. In this way, the reinforcing member 50 is provided at the fixed position where the stress is maximized by the load acting on the retractor 34, and the strength of the vehicle body can be effectively ensured with little reinforcement.

Moreover, in this embodiment, since the retractor 34 is arrange | positioned ahead of the pillar 37, the protrusion to the vehicle left-right direction center side of the retractor 34 can be suppressed. Therefore, a reduction in the opening area of the rear part of the vehicle or the size of the rear window can be suppressed.
In addition, this invention does not limit the shape of the bracket 40 to the shape of said embodiment. In the present invention, as long as the retractor 34 and the strength member of the vehicle body are connected via the bracket 40, the shape of the bracket 40 may be appropriately changed according to the shape of the vehicle body and the mounting position of the retractor 34. .

1a Central seat 2 Seat belt device 7 Upper body seat belt 34 Retractor 37 Pillar 40 Bracket 50 Reinforcement member

Claims (3)

A seat belt retractor mounting structure for mounting a retractor capable of winding an upper seat belt on a rear center seat of a vehicle to a vehicle body,
Including a bracket fixed to the vehicle body at a plurality of locations,
A seat belt retractor mounting structure, wherein the retractor is fixed to the vehicle body via the bracket.   The seat belt retractor mounting structure according to claim 1, wherein the bracket is fixed to a pillar extending in a vertical direction at least at a rear portion of the vehicle body.   The reinforcing member is provided on the vehicle body with respect to a fixed position closest to a connection position between the retractor and the bracket among a plurality of fixed positions of the bracket with respect to the vehicle body. The seat belt retractor mounting structure described in 1.

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